从各方寻到下面方法：
```
UIBarButtonItem*rightitem = [[UIBarButtonItemalloc] initWithTitle:@"确定"style:(UIBarButtonItemStyleDone) target:selfaction:@selector(moreConfig:)];
self.navigationItem.rightBarButtonItem = rightitem;[self.navigationItem.rightBarButtonItem setTintColor:[UIColorredColor]];
```
但是我尝试并没有成功，尝试下面的方式成功实现想要的效果：
```
UIBarButtonItem *rightitem = [[UIBarButtonItem alloc]initWithTitle:@"确定"style:(UIBarButtonItemStyleDone)target:selfaction:@selector(moreConfig:)];
NSDictionary *dic =[NSDictionarydictionaryWithObject:DRGBCOLOR(44,163,255,1)forKey:NSForegroundColorAttributeName];[rightitemsetTitleTextAttributes:dicforState:UIControlStateNormal];
self.navigationItem.rightBarButtonItem = rightitem;
```
